NTSB Identification: ATL90LA005.
The docket is stored on NTSB microfiche number 41457.
Accident occurred Sunday, October 08, 1989 in MAYSVILLE, KY
Probable Cause Approval Date: 06/26/1992
Aircraft: CESSNA 120, registration: N1829N
Injuries: 1 Minor.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

ENGINE LOST POWER WHEN ALL OIL WAS LOST FROM ENGINE IN FLIGHT THROUGH HOLE IN ROCKER BOX COVER WHICH WAS RESULT OF 5 OF 6 SECURING SCREWS BEING MISSING AND COVER VIBRATING AGAINST ROCK ARM. AIRCRAFT COLLIDED WITH POWERLINES DURING SUBSEQUENT FORCED LANDING. PLT/OWNER STATED HE HAD INSPECTED ALL NUTS AND BOLTS 16 FLIGHT HOURS BEFORE ACCIDENT.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

THE IMPROPER INSPECTION OF THE AIRPLANES ENGINE BY THE PILOT/OWNER RESULTING IN FIVE ROCKER BOX COVER SCREWS BEING MISSING AND SUBSEQUENT LOSS OF ENGINE OIL DUE TO THE COVER VIBRATING AND CAUSING A HOLE TO BE WORN IN IT. SUBSEQUENT LOSS OF ENGINE POWER DUE TO LOSS OF ENGINE OIL RESULTED IN A FORCE LANDING AT WHICH TIME THE AIRPLANE COLLIDED WITH POWER LINES.

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